Why do non-smokers stay with smokers, and non-smokers are more harmful?

When someone smokes around you, or you enter a room where people often smoke, have you ever felt pain in your eyes and discomfort in your nose and throat? Even after you left the smoking area, did you find that your clothes still smelled of tobacco? If the answer is yes, you may have involuntarily inhaled second-hand smoke. What is secondhand smoke? Secondhand smoke is a kind of mixed smoke emitted when cigarettes, pipes or cigars burn or exhaled by smokers when they smoke. Secondhand smoke is the most common pollutant in many smoking places. Smoke emitted during smoking can release more than 4,000 kinds of gases and particles, most of which are very strong irritants, and at least 40 of them can cause cancer in humans or animals. The particles contained in secondhand smoke are particularly dangerous, because after quitting smoking, these particles can still stay in the air for several hours, can be inhaled by other non-smokers, and may be mixed with the decay products of radon gas, causing greater harm to human health. How does secondhand smoke endanger health? When smoking harms smokers' own health, second-hand smoke will also affect non-smokers. In addition to irritating eyes, nose and throat, it will also significantly increase the risk of lung cancer and heart disease in non-smokers. Greatly increase the chances of children suffering from respiratory diseases. If children live with some smokers, their respiratory system will be more susceptible to infection. Other symptoms include increased cough, asthma, excessive phlegm, impaired lung function and slow lung development. According to this study, if one or more members of a family smoke, children will have a greater chance of suffering from respiratory diseases. If the husband has the habit of smoking, the wife is more likely to get lung cancer even if she doesn't smoke. How do I know if I am affected by secondhand smoke? If you have the following situations, you are likely to have been potentially affected by secondhand smoke: you smell secondhand smoke. You stayed in a smoking-permitted place with central ventilation system for a period of time, and there was no specific smoking area in that place, or there was a smoking area, but smokers did not abide by the regulations and chose to smoke in the non-smoking area. Your friends, colleagues or family members smoke in your activities, or worse, smoke in front of you. How to protect yourself and others from secondhand smoke? Because there is no absolute safety standard for secondhand smoke, the best way to protect your health is to stay away from the source of secondhand smoke. Whether you are a smoker or not, you can also reduce the influence of second-hand smoke on you and others: if you have the habit of smoking, you'd better give it up, or try to reduce smoking, and only smoke in well-ventilated places. If you don't have the habit of smoking, you should avoid staying in places where smoking is allowed and encourage your friends and family not to smoke. If you are a property manager, you should advocate and implement a no-smoking policy, or only allow smoking in designated smoking areas with independent ventilation systems. Under no circumstances are air polluted by secondhand smoke allowed to flow back to the no-smoking area.